Internal Conversion of Gamma-Rays from Co60, Cs134, Zn65

Abstract

Using a double-coil, thin-lens magnetic beta-ray spectrometer of transmission 2.40 percent and line width of approximately 3.0 percent, the internal conversion coefficients of the gamma-rays from ${\mathrm{Co}}^{60}$, ${\mathrm{Cs}}^{134}$, and ${\mathrm{Zn}}^{65}$ have been measured. Sufficient precision has been attained in several cases to verify the theoretical values and to obtain unambiguous identification of the multipole character of the gamma-rays. Internal conversion coefficients as small as ${10}^{-5\mathrm{}}$ can be measured with a precision of 5 percent or better.